Slide content:How Has Public Health Improved Health Care? - 2 Example of epidemiology at work: 1854 Cholera epidemic in London, England Cholera is a bacterial disease Lack of sanitation and overcrowding led to the spread of disease Dr. John Snow linked the spread of disease to contaminated Broad Street public water pump Snows hypothesis: Cholera was spread by contaminated water 9

Slide notes:Here is an example of epidemiology at work: In 1854, an epidemic of cholera ravaged London, England. Cholera is a bacterial disease spread by contamination of food or water. Lack of sanitation and overcrowding were important factors that led to the spread of disease. Dr. John Snow, a physician, linked the spread of disease to a contaminated public water pump on Broad Street. Snow hypothesized that the disease was spread by contaminated water, and he used statistics to connect the quality of water to the number of cases of cholera. 9